Simple. hyper is written in 100% pure Python, which means no C extensions.
For recent versions of Python (3.4 and onward, and 2.7.9 and onward) it’s
entirely self-contained with no external dependencies.

hyper supports Python 3.4 and Python 2.7.9, and can speak HTTP/2 and
HTTP/1.1.

Please be warned: hyper is in a very early alpha. You will encounter bugs
when using it. In addition, there are very many rough edges. With that said,
please try it out in your applications: I need your feedback to fix the bugs
and file down the rough edges.